Int J Biol Sci 2024; 20(4):1413-1435. doi:10.7150/ijbs.91284 This issue Cite
Research Paper
1. Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an Shaanxi 710061, People's Republic of China.
2. Key Laboratory of Surgical Critical Care and Life Support (Xi'an Jiaotong University), Ministry of Education, People's Republic of China.
3. Department of Vascular Surgery, Xiangya Hospital, Central South University, Changsha, People's Republic of China.
4. Department of Hepatobiliary Surgery and Liver Transplantation, The Second Affiliated Hospital of Xi'an Jiaotong University, People's Republic of China.
5. Department of SICU, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an Shaanxi 710061, People's Republic of China.
6. Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an Shaanxi 710061, People's Republic of China.
7. Department of Vascular Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an Shaanxi 710061, People's Republic of China.
8. MOE Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an Shaanxi 710061, People's Republic of China.
9. Department of Ophthalmology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an Shaanxi 710061, People's Republic of China.
Caspase-11 detection of intracellular lipopolysaccharide mediates non-canonical pyroptosis, which could result in inflammatory damage and organ lesions in various diseases such as sepsis. Our research found that lactate from the microenvironment of acetaminophen-induced acute liver injury increased Caspase-11 levels, enhanced gasdermin D activation and accelerated macrophage pyroptosis, which lead to exacerbation of liver injury. Further experiments unveiled that lactate inhibits Caspase-11 ubiquitination by reducing its binding to NEDD4, a negative regulator of Caspase-11. We also identified that lactates regulated NEDD4 K33 lactylation, which inhibits protein interactions between Caspase-11 and NEDD4. Moreover, restraining lactylation reduces non-canonical pyroptosis in macrophages and ameliorates liver injury. Our work links lactate to the exquisite regulation of the non-canonical inflammasome, and provides a basis for targeting lactylation signaling to combat Caspase-11-mediated non-canonical pyroptosis and acetaminophen-induced liver injury.
Keywords: caspase-11, non-canonical pyroptosis, lactate, lactylation, NEDD4.